package com.heima.common.exception;


import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import lombok.extern.slf4j.Slf4j;
import org.springframework.messaging.handler.annotation.support.MethodArgumentNotValidException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

@ControllerAdvice  //控制器增强类
@Slf4j
public class ExceptionCatch {

    /**
     * 处理不可控异常
     * @param e
     * @return
     */
    @ExceptionHandler(Exception.class)
    @ResponseBody
    public ResponseResult exception(Exception e){
        e.printStackTrace();
        log.error("catch exception:{}",e.getMessage());

        return ResponseResult.errorResult(AppHttpCodeEnum.SERVER_ERROR);
    }

    /**
     * 处理可控异常  自定义异常
     * @param e
     * @return
     */
    @ExceptionHandler(CustomException.class)
    @ResponseBody
    public ResponseResult exception(CustomException e){
        log.error("catch exception:{}",e);
        return ResponseResult.errorResult(e.getAppHttpCodeEnum());
    }

    /**
     * 对参数进行效验错误
     * @param e
     * @return
     */
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseResult paramException(MethodArgumentNotValidException e){
        BindingResult bindingResult = e.getBindingResult();
        List<ObjectError> allErrors = bindingResult.getAllErrors();
        StringBuilder builder = new StringBuilder();
        for (ObjectError allError : allErrors){
            FieldError fieldError = (FieldError) allError;
            builder.append(fieldError.getField());
            builder.append(fieldError.getDefaultMessage());
            builder.append(" ");
        }
        return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,builder.toString());
    }

}

